Pump.



v PATENTED AUG. 25, 1903.

G. G. RICHARDS.

PUMP.

APPLICATION FILED Nev.1o, 1902.

no MODEL.

' Patented August 25, 1903'.

I UNITED STATES {PATENT A OFFI E;

cEoRcE'o. RICHARDS, or BERKELEY, oALIEoRniiia PU MP.

SPECIFICATION forming part of Letters Patent No. 737,274, datedAugust25, 1903. A uauon filed November 10, 1902. Serlal No. 130,728. (Nomodel.) i

To all whom it 'may concern.-

Be it known that I, GEORGE O. RICHARDS, a citizen of the United States,residing at Berkeley, county of Alameda, State of California, haveinvented an Improvement in Pumps; and I hereby declare the following tobe a full, clear, and exact description of the same.

My invention. relates to-improvements in pumping apparatus. Its objectis to provide a pump of simple construction which is adapted for useparticularly in oil-wells, where great difficulty is experienced inlifting heavy oils and those containing considerable quantities of sandand like gritty foreign substances.

The invention consists of the parts and the construction and combinationof parts,hereinafter more fully described, having reference to theaccompanying drawings, in which- Figure 1 is a side view;of myinvention. Fig. 2 is a front view of, same impartial sec; vtion. Fig. 3is a modification of same.

In oil-well pumping as ordinarily conduct ed at present a bucket-valveattached to a sucker-rod reciprocable within a stationary pump-barreland discharge-pipe is used. This bucket-valve being disposed above theinlet-valve in the bottom of'the pump-barof the oil, particularly whereit carries considerable sand in suspension, oifers great resistance tothe downward stroke of the valve, which must opento allow the fluid topass upward. The resistance is not infrequentlygreat enough to cause asucker-rod to buckle and rub against the casing, with consequentundesirable wear on the latter and on the rod. Much of the difficultysuggested is obviated by the following constructionz' As illustratedinthe'drawings,A-represents the usual well-casing, and 2 the main pipe,through which the oil or other fluid is discharged from the well. Thelower end of pipe 2 terminates in a pump-barrel or cylinder-section 3,having a suit-able inlet-valve 4 at its lower end. A bucket or cylinder5 is More-' over, the heavy viscous character of much bored to have asnug moving fit on the outside of barrel 3 andis reciprocated by meansof .the rods 6, operated from any suitable source" of power. Cylinder 5projects always below the lower .end of barrel 3 and has a by reason ofthe vacuum formed behind it to allow the cylinder to fill. Onlifting thefluid is forced upward past valve 4 to the surface.

The fact thatthe movable part 5 is of greater area than the stationarypart 3 and that it carries the larger. valve aifords, in the firstinstance, a relatively greater lifting force on valve 4 than where themovable part is incased within the barrel, and, in the second instance,less resistance is oflefred bythe fluid on'the downstrokeOonsequentlyless power is required to actuate a bucket and the liabilityof bending. the sucker-rods is lessened.

Straps or guides 9 are secured at intervals to pipe 2 to steady therods-and keep them out of contact with the casing and pipe. Guide-rods10 may be riveted to pipe '2 above where cylinder 5 works, extendingdownward exterior tothe cylinder and terminating in the inwardly-curvedends 11 to prevent the cylinder from coming in'contact with the bottomof the well and to prevent the cylinder fallingfrom the end of thebarrel and being lost inthei'well in case it should. fonany reasonbecome detached from the rods. Again, by reason of a reciprocable part,as 5, operatingbelow the pump-intake a constant agitation is kept up inthewell, and the sand is (I prevented from settling and packing aboutthe end of the pump-barrel. r p

In Fig. 3 is shown a -n1odification' adapted as a compound pumpto beused in conjunction, for example, with windmills. In this case the maindelivery-pipe'2 branches at its lowerend to form the pump-barrels 3',and the pump-cylinders 5 are movable upon these barrels in the manner asfirst described. By imparting an alternating reciprocating motion tothese barrels a practically continuous stream may be discharged throughpipe 2'.

, in line above the cylinders and to which the sucker-rods 6 are pivotedat opposite points on the disk. 13 is a rod connecting-with thewindmill-crank and adapted by the revolution of the latter to impart anoscillating movement to disk 12 and cause the pumpcylinders 5' to actalternately, as readily understood. The sucker-rods 6 are guided in thecross-head 9', secured on pipe 2, and are attached to a ring or flangepart 14, screwed upon the upper end of each of cylinders 5. Guide-rods10, secured to the cross-head 9, extend down through guides 14E beneaththe ends of the cylinders similarly and for the same purpose as wererods 10 in Fig. 1.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. The combination in a pump, of two telescoping cylinders, one movablein relation to the other and projecting below the lower end of thelatter, and inwardly-opening valves in each of said cylinders, and meansextending into the path of the lower end of the movable cylinder adaptedto prevent the end of the cylinder coming in contact with the bottom ofthe Well.

2. The combination in a pump, of a stationary pump-barrel, a valvetherein, a discharge-pipe therefor, a cylinder reciprocable on theoutside of said barrel and having a snug fit therewith, a valve in saidcylinder, sucker-rods exterior to the discharge-pipe, guides for saidrods, and guides extending from a point above down along the cylinderand into the path of the latter and serving to support the cylindershould it become detached from the rods limiting the downward movementof said cylinder.

3. The combination in a pump, of a stationary cylinder, a discharge-pipetherefrom, a movable cylindrical section telescoping said stationarycylinder and projecting below the lower end of the latter,upwardly-opening valves in the lower end of each cylinder, andguide-rods secured to the pipe and extending into the path of themovable cylinder below the lower end of the latter for the purposes setforth.

4. The combination in a pump of a main discharge-pipe, a plurality ofpump-barrels on the end thereof, cylinders reciprocable on the outsideof said barrels, valves in said barrels and cylinders, means for givingsaid cylinders an alternating reciprocating movement, and guidessupported fromabove and extending beneath the lower end of the cylindersand serving to suspend the latter should they become detached.

In Witness whereof l have hereunto set my hand.

GEORGE C. RICHARDS.

Witnesses:

S. H. NoURsE, JESSIE O. BRODIE.

